| 摘要 |
<p>Abstract METHOD, SYSTEM AND APPARATUS FOR DETERMINING A HASH CODE REPRESENTING A PORTION OF AN IMAGE 5 A method of determining a hash code representing a portion of an image, is disclosed. A Delaunay region (e.g., 450) enclosing an image feature point (e.g., 210) representing at least the portion of the image is determined. The Delaunay region is determined from A* lattice points. A mapping transforming the Delaunay region to a predetermined canonical form is determined. A point of the Delaunay region is received. The received point defines a 1o plane containing the A* lattice points of the Delaunay region excluding the received point. A normal of the plane is determined by setting at least two co-ordinates of the normal to predetermined non-zero values, the two co-ordinates being selected according to the determined mapping. The hash code representing a portion of the image is determined according to a distance determined using the normal. 6218288vi P032210_SpeciAs Filed - 1/16 Record Feature Vector Fig. 1 6218280_1.VSD Al I RIMA I</p> |
